User's Manual

TB8100 Installation and Operation Manual Connection 87

Terminate and insulate the DC input leads so they are protected from

accidentally shorting to the subrack if the PMU is removed before the leads

are disconnected.

Reciter Auxiliary DC

Input

The system interface PCB in the reciter has an auxiliary DC input

connector. DC from the auxiliary DC output on the PMU (see

“PMU

Auxiliary DC Output”

below) can be supplied to the +AUX_V pin on the

system interface connector via this input.

The pin allocations for the auxiliary DC input on the system interface PCB

are given in the following table. Note that pins 1 & 3 and pins 2 & 4 on this

connector are linked. Refer to

“System Connections” on page 89 for the

pin allocations for +AUX_V on each system interface PCB.

The DC output from the PMU is 12VDC. Although this power output is

isolated, the negative side of the supply is grounded on the system interface

PCB to give a +V output.

PMU Auxiliary DC

Output

The PMU can provide an auxiliary DC output when it is fitted with the

optional 40W auxiliary power supply PCB. This power supply is current

limited to 3A and is available on the auxiliary DC output connector on the

rear panel. DC from this output can be supplied to the +AUX_V pin on

the system interface connector on the reciter via the auxiliary DC input

connector on the system interface PCB (see

“Reciter Auxiliary DC Input”

above).

The pin allocations for the auxiliary DC output on the PMU are given in

the following table. Note that pins 1 to 4 and pins 5 to 8 on this connector

are linked.

Figure 7.6 Recommended DC Power Connection

Battery

PMU

Circuit Breaker

or Fuse

Pin Description Links

1+V input

2 ground

3+V input

4 ground

rear view